ES2204504T3 - FLUID SEPARATION DEVICE. - Google Patents

Abstract

The invention relates to a fluid separating device for separating fluids and solids from a composite liquid. Said separating device comprises a channel (12) which is arranged transversely upwards with a closed lower end and an outlet (19). Said channel is provided with an axial screw conveyor (14) which is arranged in the interior. A filter tank (22) communicating with said conveyor is located above the channel (12). An inlet (32) for the composite liquid to be separated is located at the upper edge approximately in the middle of the filter tank (22). A rotation filtering device (34, 70, 92) is arranged at the free end of the filter tank (22). Said device partially dips into the fluid contained in the filter tank (22). The invention provides a means for effectively separating a composite fluid into three different fractions, the clear liquid, a sludge fraction and a particle fraction.

Description

Fluid separation device.

The invention concerns a device of fluid separation to separate liquids and solids from a fluid multimatter Such devices are used in debugging water, material and sludge thickening and ash removal or fractionation, especially in the paper industry.

Fluid separation devices Conventionals work according to different principles to separate the clarified fluid of the different solids, depending on the separation principle of the expected fluid composition multimatter

In US 4 274 963 a disclosure is disclosed gender separation device exposed. This is used typically in suspensions from the treatment of paper containing paper fibers, light dirt (plastics, wood) and light dirt, such as glass, sand and metal parts. Due to the specific weight difference, heavy dirt could be separated properly quite good water through this device sedimentation. However, this separation would work only when light dirt was not present, since the fibers and plastics, on the one hand, hinder or disturb persistently the sedimentation process. On the other hand, this light dirt forms a floating blanket in the surface area free in the filtering tank, which would lead to difficulty its entrance or even to the machine clogging.

On the other hand, light materials have been able separate quite well from the water using a so-called thickener discs. However, a disk thickener of this class is exposed at very large wear on request with heavy dirt like sand and glass, which would make necessary work of maintenance and repair with a disproportionate frequency or, in Ultimately, it would clearly reduce the life of the device complete and therefore also performance. In other words, regardless of whether a device according to the document of the exposed gender is arranged rheotechnically in front of or behind a disc thickener, only a separation process is obtained insufficiently effective

JP 63 084612 A discloses a fluid separation device for blast furnace slag with an arrangement of a transport screw and a filter Rotary postponed. In this device, a flow direction, first performed by means of the screw endless separation of coarse materials and taking place at then, behind an overflow partition, the separation of fine materials by means of the rotary filter arrangement postponed

Document DE 42 39 083 A discloses a separation device in which a device is first requested rotary filter and then an auger. Screw auger is a pure transport auger screw to unload the thick matter of the rotary filter. This device has two outlets for filtering and thick matter.

Starting from this, the invention is based on the problem of indicating a fluid separation device for a fluid containing fibrous materials, which works without wear and tear which unfolds, with high quality, a multimatter fluid in three different fractions, the clarified liquid, a sludge fraction and a fraction of particles. The multimatter fluid should unfold here with high quality in three different fractions, the clarified liquid, a fraction of sludge and a fraction of particles

According to the invention, this problem is solved with the characteristics indicated in claim 1. Advantageous improvements of the idea of the invention are emerge from the subordinate claims.

By combining features of the claim 1 a discharge according to the invention is achieved Continuous light dirt through the filter device rotating, which prevents sedimentation from resulting hindered by light parts and thus reliably separates the heavy dirt in the sedimentation space.

By means of the invention it is achieved, on the one hand - compared to a serial connection of already known machines - a noticeably clearer separation of the two fractions of solids in heavy parts (generally inorganic and suitable for the landfill) and in light parts (generally organic and suitable for combustion or reusable in the process), and the liquid clarified has experienced, on the other hand, a degree of considerably higher clarification. At the same time, the device works less prone to breakdowns and therefore more profitably compared to the fictional serial assembly above indicated of two individual devices.

An essential advantage of the provision according to the invention has to be seen in that it is possible with a compact structure a separation of a mixture of fluid-solids in Three different fractions. The device according to the invention is conceived in such a way that there is hardly any obstruction or functional disability and the provision makes possible a flow of very high fluid

The invention and its invention are explained below. forms of execution referring to the attached drawings.

They show in these:

Figure 1, a schematic longitudinal section of a first embodiment of a separation device according to the invention;

Figure 2, a schematic plan view of the separation device according to figure 1;

Figure 3, a schematic front elevation of the separation device according to figures 1 and 2;

Figure 4, a schematic section of a arrangement of rotary filter discs as a component of separation device;

Figure 5, three longitudinal sections schematics of alternative executions of filtering tanks with provisions of guide plates;

Figure 6, three schematic section views of a separation device according to the invention with equipment gas insufflation;

Figure 7, a schematic longitudinal section of a second embodiment of the invention with a team of drum filter;

Figure 8a, a schematic cross section along line A-A in figure 7;

Figure 8b, a schematic cross section along line B-B of Figure 7; Y

Figure 9, three views or schematic sections of a third embodiment of the invention.

The first execution of a device fluid separation 10a schematically represented in the Figures 1 to 3 in three views consists substantially of a channel elongated 12 inclined at a certain angle with respect to the horizontal, inside which an endless screw of transport or a transport spiral 14. The worm screw transport 14 is alternately supported at both ends axial or is simply placed inside channel 12. In both cases, this is rotated by means of a device 16 of screw drive, preferably electric, of such so that said screw acts in the direction indicated by the arrow A. Channel 12 is supported by a foundation 20, preferably through uprights 18. At the upper end of the channel 12 is provided an exit 19 of solids.

A filter tank is mounted on channel 12 22 that appears as triangular in longitudinal section (figure 1), whose upper edge 24 runs horizontally. How can see in figure 3, the filtering tank 22 has a section transverse that is reduced down and that is adapted to the width of channel 12. In Figure 2 it can be seen that the tank of filtering 22 is preferably divided into three sectors, a first sector 26 in which the width is enlarged from the end, a central sector 28 with maximum width, preferably approximately constant, and a third sector 30 in which the width decreases again to the width of channel 12. Naturally, due to the narrowing down (figure 3), the contour described here and represented in figure 2 is applied in strict sense only for the upper edge 24 of the tank filtered 22.

As can be seen in figure 1, in the area from the upper end of the central sector 28 an entrance is provided 32 of matter to separate.

In the area of end 34 (the free vertex of the triangle) of the filter tank 22 a device 34 is mounted of rotary disk filter that is schematically represented in detail in Figure 4. The rotary filter device 34 of discs are supported on the foundation 20 through uprights 38.

Also, between entry 32 of matter a separate and the rotary disk filter device 34 is provided a baffle plate 36 which is located in the near the entrance 32 of matter to be separated and that is preferably set in approximately L-shape with a first sector approximately vertical and a second sector that runs from oblique to approximately horizontal and that extends towards the entrance 32 of the matter to be separated. The baffle plate 36 is fixed at both ends on the wall of the filter tank 22.

In figure 4 it is represented in section transversal an embodiment of the rotary filter device 34 of disks that, as opposed to the execution represented in the Figures 1 to 3, comprises not three, but six pairs 40 of disks filtering

Therefore, the rotary filter device 34 of disks depicted in Figure 3 comprises six pairs 40 of filter discs that are coaxially mounted one after another on a rotating shaft 42. This tree is driven through a drive device 44. The various filter discs 46 of each pair 40 consist of a support structure (not represented) on which a disk-shaped sieve is mounted to through which the clarified liquid can be passed. In the opposite side of the entrance is an exit 48 of matter thick (figure 1). The filter discs 46 separate the inside the rotary filter device 34 in two areas separated from each other by sieves, arrival zone 50 and the discharge zone 52, which flows into the fluid outlet 54 clarified To this end, filter discs 46 are sealed with with respect to a housing 55 along its outer perimeter by joint means 53.

The operation of the first embodiment of the separation device 10a of fluid according to the invention.

The multimatter fluid to be separated into three fractions enters filter tank 52 through the inlet 32 of the matter to be separated. The flow is diverted here by the sheet baffle 36 towards a direction away from the device 34 of rotary disk filter, so that the fluid has to follow the path indicated with arrow B (figure 1). Heavy particles, as especially coarse sand, stones, metal parts, etc., which they are indicated with the reference symbol 57, then migrate down towards channel 22 and, therefore, towards the zone of action of the transport auger 14, through which these components are transported up the channel 12 to the exit 19 of solids and are removed through it.

At the same time that solids are directed towards below, lighter materials, especially fibrous materials, etc., are directed up to level 58 of the liquid and are then moved in the direction of the rotary filter device 34 Of discs. In the arrival zone 50 thereof, the amount of fibrous-liquid matter, which thickens every again, it enters the area of influence of the filter discs swivels 46, which, actuated by means of the device drive 44, rotate clockwise indicated in figure 1 with arrow C. Therefore, due to the spin action the mixture is dragged more and more in clockwise, passing the liquid fraction through the sieves in the axial direction of the shaft 42 until reaching the separate discharge zone 52, which is indicated in Figure 4 by means of the arrows D. The clarified liquid then leaves the outside through outlet 54 of clarified fluid.

Due to the increasing phase extraction liquid thickens more and more the mixture that remains between the discs filter 46 and this is finally discharged through the outlet 48 of thick matter.

The fluid separation device 10a described above makes it possible, according to the invention, a excellent separation of a multimatter mixture, such as the one Presents especially in the paper industry, in three fractions usable or disposable separately. Heavy materials, such as sand, stones, large metal particles, etc. (for example, staples), form the first fraction of heavy pieces, the materials fibrous and minerals along with fine sand, other small particles (for example, organic particles with a density less than that of water, such as Styropor) form the second fraction of thickened sludge, and the filtered fluid, preferably water, forms the third fraction of clarified fluid. According to the choice of the surface and time of stay, the composition between the first and the second fraction can be varied within certain limits.

In figures 5a to 5c three are represented improvements of the invention in which they are provided in the inside the filter tank 22 several guide plates 60 spaced apart in parallel, which preferably occupy all the width of the filter tank 22, that is to say they are mounted by both sides on the unrepresented side walls of the tank filtered 22. These 60 guide plates reach up to almost the free level 58 of the liquid in the filtering tank 22 and by down to the immediate vicinity of the transport screw 14. Using the guide plates 60, the fluid path to separate. In particular, the fluid multimatter is first driven down in the direction of transport screw 14 by means of a first group of 60a guide plates, to be driven downstream of the entrance 32 of the matter to be separated, by a second group of plates 60b guidelines, in the direction of the rotary filter arrangement 34. According to the route to be preset for the current of fluid, you can choose the variant of figure 5a, figure 5b or Figure 5c

Figures 6a to 6c show a section. schematic cross section, a longitudinal section and a view in plant of an improvement of the invention that is characterized because a device 62 for gas insufflation is provided, consisting of substantially in a gas inlet 64, a pipe of approximately 66 T-shaped feed and three pipes of insufflated 68 that protrude approximately in the form of W. insufflated pipes 68 are arranged several nozzles of insufflated to conduct a gas, preferably compressed air, towards the filtering tank 22 and to accelerate and improve the process of separation between heavy heavy particles of solids and fine particles causing the fine gas bubbles to be form accumulate in small particles and transport them to the surface 58 of the liquid.

In figures 7 and 8 a second is represented embodiment of the invention. This second form of execution of a fluid separation device 10b is structured of identical to the first form of execution in regard to to the designated parts with the same reference symbols as in The preceding figures. It differs from these because, instead of rotary filter device 34 (figures 1 to 6), has been planned a first execution of a filter device 70 of drum.

This drum filter device 70 consists of substantially in a sieve drum 74 driven by means of a drive 72, whose enveloping surface is constituted by a sieve or tissue and, therefore, can be traversed by fluids. In the inside of the sieve drum 74 is arranged a spiral of transport 76 presenting in the execution shown a step that decreases in the direction of transport F. Below the drum sieve 74 is provided a collection tray 78 which flows into an outlet 80 of clarified fluid for the purified liquid.

Above the screen drum 74 a drum cleaning equipment 82 comprising an arrangement of several cleaning nozzles 84 that spray a cleaning liquid on the sieve drum for cleaning. Inside the drum preferably a liquid collecting channel 86 of cleaning that collects the cleaning liquid and leads it to the tank filtered 22.

The drum filter device 70 is charged with pre-cleaned liquid from filter tank 22 through a gargoyle 88. Of course, in this form of execution you can apply the improvements represented in figures 5 and 6 in shape of the guide plates 60 and the insufflation equipment 62 of gas.

In this embodiment, the separate mixture is already of the coarse particles of solids in the filtering tank 22 is transported through gargoyle 88 to the inside of the drum screen 74, the liquid being able to pass through the openings of the screen and accumulating in collection bin 78 and being evacuated by the outlet 80 of clarified fluid. The solids are transported to above by the transport spiral 76 in the direction designated with F contrary to the inclination of the drum shaft, making a thickening due to the additional evacuation of the liquid. These thickened solids leave the sieve drum through a 90 solids outlet.

The rotating sieve drum 74 is cleaned in the passage area of its upper cusp by means of equipment 82 of drum cleaning A cleaning liquid is sprayed for it, preferably water, on the sieve drum 74, whereby the adhered particles escape into the collecting channel 86 and are returned to filter tank 22.

Figures 8a and 8b show two sections cross-sections along lines A-A and B-B, respectively, of Figure 7, the ring shown in thick stroke the transport spiral 76 with Sieve drum 74 formed outside. It can be deduced from both sections that the transport spiral 76 preferably presents a depth that decreases in the direction of transport.

In figures 9a, 9b and 9c three are represented views or schematic sections of a third form of execution of the fluid separation device 10e according to the invention, which it differs from the previous forms of execution 10a and 10b because The rotary filter device is built like a drum sieve 92 arranged in the filter tank 22. Otherwise, the same reference symbols re-designate equal components to those of the previous forms of execution. Without this being explain even in detail, this form of execution naturally it may also be provided with the improvements described in relationship with figures 5 and 6.

As can be deduced from the figures 9a-c, the sieve drum 92 is approximately up to 50% below level 58 of the liquid in the filter tank 22. The sieve drum 92 comprises a rotation shaft 94 at one end of the which is provided a drum drive unit 96. In the opposite axial end is coaxially mounted a tube 98 of discharge of clarified fluid. Directly adjacent to the perimeter External drum sieve 92 is provided at the end of the tank of filtering 22 a runoff edge 100 belonging to a exit 102 of thick matter.

The operation of this form of execution is identical to the previous executions, except as far as refers to the operation of the sieve drum 92. Hereby run the fluid released from solids crosses the surface permeable envelope 104, especially in the lower submerged area of the sieve drum 92 (indicated by arrows), and circulates inside from the sieve drum 92 to the fluid discharge tube 98 clarified The thick materials that accumulate especially in the zone of level 58 of the liquid cannot cross the surface envelope 104, but are dragged during the movement of rotation of the latter (in figure 9b counterclockwise of the clock) and are removed at the edge of desescoriado 100, from where they reach the exit 102 of thick matter.

Claims (25)

1. Fluid separation device for separating liquids and solids from a multimatter fluid containing fibrous materials, with the following characteristics : a) a channel (12) arranged inclined towards up and equipped with a closed lower end and an outlet (19) in the upper end comprises a transport screw (14) that is arranged inside and that runs in the direction axial; b) a lower part of the channel (12) forms a oblique bottom sector of a filter tank (22) with one end closed and an open end; b1) an upper part of the channel (12) with the Exit (19) is projected beyond the edge (24) of the tank filtering (22) in the area of the closed end of the tank; c) in the center between the open end and the closed end of the filter tank (22) is provided a input (32) of the matter to be separated for the multimatter fluid that it must be separated; d) at the open end of the filter tank (22) a rotary filter device (34, 70, 92) is mounted which is partially submerged in the fluid contained in the tank filtered (22). 2. Fluid separation device according to claim 1, characterized in that the channel (12) is arranged with an inclination angle of 15 ° to 30 °, preferably about 20 °, with respect to the horizontal. 3. Fluid separation device according to claim 1, characterized in that the cross-section of the filtering tank (22) decreases downward and is preferably configured approximately triangular in a vertical cross-section. 4. Fluid separation device according to claim 1, characterized in that along the upper edge (24) the width of the filtering tank (22), considered in the longitudinal direction, increases in a first sector (26), remains approximately constant in a central sector (28) in which the entrance (32) of the matter to be separated is located, and narrows in a third sector (30) to the width of the channel (12). 5. Fluid separation device according to claim 1, characterized in that several guide plates (60) are provided spaced apart and parallel to each other by groups, which extend from one side wall to another and are oriented with an inclination angle of 40º to 70º with respect to the vertical. 6. Fluid separation device according to claim 5, characterized in that the upper edges of the guide plates (60) are located below the surface (58) of the liquid and its lower edges are above the transport auger screw (14 ). 7. Fluid separation device according to claim 5, characterized in that the guide plates (60) are provided substantially throughout the filter tank (22) and a first group of guide plates (60a) are inclined in a direction between the inlet (32) of the matter to be separated and an axial end of the filter tank (22), and a second group of guide plates (60b) are inclined in the opposite direction. 8. A fluid separating device according to claim 1, characterized in that a deflector plate (36) is projected downwards in front of the inlet (32) of the material to be separated in front of the rotary filter device (34). from the upper edge of the container to suppress a flow of fluid from the inlet (32) of the matter to be separated directly to the rotary filter device (34, 70, 92). 9. Fluid separation device according to claim 8, characterized in that the baffle plate (36) is approximately L-shaped and its angled sector is directed away from the rotary filter device (34, 70, 92). 10. A fluid separation device according to claim 1, characterized in that a gas insufflation device (62) is arranged in the filter tank (22). 11. Fluid separation device according to claim 10, characterized in that several gas insufflation openings are provided above the transport auger screw (14) along the side walls of the gas insufflation equipment (62). filter tank (22). 12. Fluid separation device according to claim 11, characterized in that the gas insufflation equipment (62) comprises at least three insufflation pipes (68) provided with spaced insufflation nozzles, which, together with a transverse feed pipe (66), they represent a structure of approximately W shape, the two outer insufflation pipes (68) being arranged parallel to the side walls of the filtering tank (22) and the central insufflation pipe (68) being axially arranged . 13. Fluid separation device according to claim 1, characterized in that the rotary filter device is constructed as a disk filter device (34) with rotating shaft (42) oriented in a direction transverse to the longitudinal axis of the channel, which comprises at least one pair (40) of filter discs, a discharge zone (52) that communicates with an outlet (54) of clarified fluid being provided between the filter discs (46) of a pair (42), and an outlet being provided (48) of thick matter on the side of the pair (42) of filter discs opposite an arrival zone (50). 14. A fluid separation device according to claim 13, characterized in that one to ten pairs of discs (42), preferably three to five pairs of discs (42), arranged axially one after the other are provided. 15. Fluid separation device according to claim 13, characterized in that the filter discs (46) are constructed as meshes or sieves. 16. Fluid separation device according to claim 15, characterized in that the filter discs (46) consist of a support frame and sieve fabric. 17. Fluid separation device according to claim 16, characterized in that the sieve fabric is constructed in two layers and consists of a large mesh support fabric and a fine mesh filtration fabric. 18. Fluid separation device according to claim 13, characterized in that the filter discs (46) are sealed along their peripheral edge with respect to a housing (55). 19. Fluid separation device according to claim 1, characterized in that the rotary filter device is constructed as a drum filter device (70) with a rotary sieve drum (74) inside which a transport spiral (76) is fixed. ), and the inside of the drum can be loaded with fluid from the filter tank (22), and cleaning nozzles (84) are also provided for cleaning the sieve drum (74). 20. Fluid separation device according to claim 19, characterized in that the transport spiral (76) has a passage that decreases in the transport direction. 21. Fluid separation device according to claim 20, characterized in that the axis of rotation of the sieve drum (74) is slightly inclined with respect to the horizontal one, preferably at an angle of 5 ° to 20 °, the transport direction running with inclination towards above. 22. Fluid separation device according to claim 19, characterized in that a collecting channel (86) is placed below the cleaning nozzles (84) that conducts the cleaning fluid to the filter tank (22). 23. Fluid separation device according to claim 1, characterized in that the rotary filter device is constructed as a sieve drum (92) disposed in the filter tank (22) and whose rotation axis (94) is approximately at the height of the free level (58) of the liquid in the filter tank (22). 24. Fluid separation device according to claim 23, characterized in that concentrically to the axis of rotation (94) is provided on at least one side a tube (98) for discharging the clarified fluid. 25. Fluid separation device according to claim 23, characterized in that a de-run edge (100) borders on the outer side with the enveloping surface (104).